BFC238311563

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Film Capacitors

The film capacitor (BFC238311563) is nothing but a capacitor which uses a plastic film as the dielectric or an insulator as its construction material. This type of capacitor was first introduced in the late 1960s and since then it has been in wide use in consumer electronics and analog audio products. The film used for the construction needs to have a specific thickness and a very low dielectric constant, also known as the dissipation factor. This dissipation factor determines the amount of resistance between the capacitor plates and is typically in decimal point lower numbers in comparison to ceramic and electrolytic capacitors.

Application Field

Film capacitors have an extensive range of applications in various fields. Since they have low dissipation factors and low ESR values, they are widely used in audio crossover networks, power supplies, filters, and many other electronic products. They are also used in AC motors, power line filters, and most of all in pulse power applications.

Working Principle

As mentioned above, film capacitors are constructed using a dielectric or a plastic film. This dielectric material has to be carefully chosen for a particular application in order to make sure that the capacitor meets the required specifications. The plates of the capacitor are then electroplated and the dielectric film is sandwiched between them. This isolates the two plates so that when an electric current passes through them, the dielectric material does not breakdown due to the presence of the electric field. The film is also responsible for preventing any short circuiting,, leakage, or dielectric absorption.

When the two plates of the film capacitors are connected to a source of alternating current or power, the capacitance of the two plates will start to change and the change depends on the frequency of the alternating current. This is due to the fact that the dielectric material used in the construction of the film capacitor is hardly affected by a steady DC voltage. The capacitance will oscillate and the amount of the oscillation is determined by the frequency of the AC current that is being applied to the capacitor. The high frequency performance of the film capacitor is typically better than other capacitors.

Advantages

The use of film capacitors in electronic circuit boards gives a number of important advantages. The first and foremost advantage is the high stability of the capacitors. This type of capacitor holds its original capacitance value for a longer period of time as compared to ceramic and electrolytic capacitors. It also provides high rate of power dissipation and has a wide frequency response. The film capacitors are able to tolerate large shock and vibrations, which makes them ideal for use in non-stationary environments. Also, these capacitors can be mounted using various techniques such as through-hole, surface-mount, or encasing in a plastic enclosure.

Disadvantages

Although the film capacitor technology provides many advantages, they also have some disadvantages. As compared to other types of capacitors, the film capacitors are typically more expensive. They require a large mounting area in order to fit in the board and also have very low self-inductance which makes them less suitable for high-speed switching applications. They also have a low ripple-handling capacity, which restricts their use in power-line applications.

Conclusion

The film capacitor (BFC238311563) has a wide range of application fields and is a suitable choice in many analog audio circuits. This type of capacitor provides many advantages, including high stability, wide frequency response, and high power dissipation. Although they have some disadvantages as well, such as higher cost and low ripple-handling capacity, their robustness and excellent high frequency performance can make them an ideal choice for certain applications.

The specific data is subject to PDF, and the above content is for reference